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You can extend an existing type to add conformance to a protocol, as described in Adding Protocol Conformance with an Extension . This includes a protocol with an associated type.

Swift’s Array type already provides an append(_:) method, a count property, and a subscript with an Int index to retrieve its elements. These three capabilities match the requirements of the Container protocol. This means that you can extend Array to conform to the Container protocol simply by declaring that Array adopts the protocol. You do this with an empty extension, as described in Declaring Protocol Adoption with an Extension :

Array’s existing append(_:) method and subscript enable Swift to infer the appropriate type to use for Item , just as for the generic Stack type above. After defining this extension, you can use any Array as a Container .

You can add type constraints to an associated type in a protocol to require that conforming types satisfy those constraints. For example, the following code defines a version of Container that requires the items in the container to be equatable.

To conform to this version of Container , the container’s Item type has to conform to the Equatable protocol.

A protocol can appear as part of its own requirements. For example, here’s a protocol that refines the Container protocol, adding the requirement of a suffix(_:) method. The suffix(_:) method returns a given number of elements from the end of the container, storing them in an instance of the Suffix type.

In this protocol, Suffix is an associated type, like the Item type in the Container example above. Suffix has two constraints: It must conform to the SuffixableContainer protocol (the protocol currently being defined), and its Item type must be the same as the container’s Item type. The constraint on Item is a generic where clause, which is discussed in Associated Types with a Generic Where Clause below.

Here’s an extension of the Stack type from Strong Reference Cycles for Closures above that adds conformance to the SuffixableContainer protocol:

Stop using warfarin and call your doctor at once if you have a serious side effect such as:

Less serious side effects may include:

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What is the most important information I should know about warfarin (Coumadin, Jantoven)?

Follow your doctor's instructions about taking warfarin while you are pregnant. Warfarin can harm an unborn baby or cause birth defects. However, the benefits of preventing blood clots in certain women may outweigh any risks to the baby.

Never take a double dose of this medication.

You should not take warfarin if you have a bleeding or blood cell disorder, blood in your urine or stools, an infection of the lining of your heart, stomach bleeding, bleeding in the brain, recent or upcoming surgery, or if you need a Rosie Kenneth Cole New York d8pnqVaX
or spinal anesthesia (epidural).

Warfarin may cause you to bleed more easily, especially if you have: a history of bleeding problems, All Weather Gravity VI Newton Running cMwEuva
or severe heart disease , kidney or liver disease, cancer, surgery or a medical emergency, a disease affecting the blood vessels in your brain, a history of stomach or intestinal bleeding, if you are 65 or older, or if you are severely ill or debilitated.

Many drugs (including some over-the-counter medicines and herbal products) can cause serious medical problems or death if you take them with warfarin. It is very important to tell your doctor about all medicines you have recently used.

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Ask your doctor before taking any medicine for pain, arthritis , fever, or swelling. These medicines may affect blood clotting and may also increase your risk of stomach bleeding.

Any doctor, dentist, surgeon, or other medical care provider who treats you should know that you are taking this medication.

Avoid making any changes in your diet without first talking to your doctor.

What should I discuss with my healthcare provider before taking warfarin (Coumadin, Jantoven)?

You should not take warfarin if you are allergic to it, or if you have:

You should not take warfarin if you cannot be reliable in taking it because of alcoholism , psychiatric problems, dementia , or similar conditions.

Warfarin may cause you to bleed more easily, especially if you have:

To make sure you can safely take warfarin, tell your doctor if you have any of these other conditions:

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